Analysis of optimal operation scheme of multi-heat source interconnected heating systems

In this paper, taking a multi-heat source interconnected heating system in Northeast China as an example, the optimal operation scheme is analysed. From the perspective of energy saving, when the heating load is less than 161.2 MW, the 350 MW extraction and condensation unit is used as the main heat source for heat supply. When the heating load is greater than or equal to 161.2 MW, the 200 MW optical axis unit is used as the main heat source for heat supply, and the 350 MW extraction and condensation unit is used first as a peak-shaving heat source for supplementary heat supply, followed by a 200 MW extraction and condensation unit as a peak-shaving heat source for supplementary heat supply. From the perspective of power peak regulation, when the heating load is less than 64 MW, the 200 MW extraction and condensation unit is used to supply heat as the main heat source. When the heating load is 64 to 69 MW, the 200 MW optical axis unit is used to supply heat as the main heat source. When the heating load continues to increase, the 200 MW extraction and condensation unit and the 200 MW optical axis unit should be used to supply heat as the main heat source at the same time, and the 200 MW optical axis unit should be operated at the minimum electrical load first, and then the 200 MW extraction and condensation unit should be operated at the minimum electrical load, and the 350 MW extraction and condensation unit should be used as a peak-shaving heat source for supplementary heating.